Votemasters can kick, but kicking is futile.
Even more futile is voting to kick by slot. Nobody will vote for "kick # 6" if it doesn't make sense, and it may not be explainable if the troll is a spammer.
Possible Solutions: enable votemasters to perform muting and temporary kickbans
or create a new level of administrator, a First Mate or Lieutenant sort of thing

or allow voting for temporary kickbans
As for voting, I would also suggest translating slot numbers into player names in the voting prompt, something like *Dave has called a vote to kick Dave (# 6).